PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

56611Screw,cap,socket Head

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 5305-00-151-5734 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-151-5734 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-151-5734. Primary manufacturer part number: 56611.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Length: 0.187 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
  • Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
  • Fastener Length: 0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Surface Treatment: CADMIUM OVERALL
  • Thread Series Designator: UNF
  • Countersink Angle: 80.0 DEGREES MINIMUM AND 84.0 DEGREES MAXIMUM
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-151-5734, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Parker Hannifin Corporation Div Hydraulic Systems Division. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-151-5734
Primary Part Number56611
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
Thread Length0.187 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN
Hardness Rating36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
Fastener Length0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationQQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentCADMIUM OVERALL
Thread Series DesignatorUNF
Countersink Angle80.0 DEGREES MINIMUM AND 84.0 DEGREES MAXIMUM
Thread Quantity Per Inch40
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Head Diameter0.260 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
Head StyleFLAT COUNTERSUNK
Thread Class3A A
Thread DirectionRIGHT-HAND
Nominal Thread Diameter0.138 INCHES IN
MaterialSTEEL OVERALL
Internal Drive StyleHEXAGON
Width Across Flats0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5310-00-186-0970 INTERCHANGEABLE
Washer,key
4730-00-555-182556611 INTERCHANGEABLE
Strainer,sediment
Arvinmeritor Inc
4730-00-764-665056611 INTERCHANGEABLE
Seat and Gasket
Spirax Sarco Inc Dba Spirax Sarco
Cross-Reference Index
Part NumberManufacturer
56611 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
Related Parts
5310-00-186-0970INTERCHANGEABLE
WASHER,KEY
4730-00-555-1825INTERCHANGEABLE
STRAINER,SEDIMENT
56611
4730-00-764-6650INTERCHANGEABLE
SEAT AND GASKET
56611

Frequently Asked Questions

What is NSN 5305-00-151-5734?

NSN 5305-00-151-5734 is a Screw,cap,socket Head, manufactured by Parker Hannifin Corporation Div Hydraulic Systems Division, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-151-5734?

NSN 5305-00-151-5734 has 1 cross-referenced part number: 56611 (Parker Hannifin Corporation Div Hydraulic Systems Division).

What NSN replaces 5305-00-151-5734?

There are 3 known substitutes for 5305-00-151-5734: 5310-00-186-0970, 4730-00-555-1825, 4730-00-764-6650. Verify interchangeability with system specifications before substitution.

What are the specifications of 56611?

Key specifications for 56611: Thread Length: 0.187 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL; Fastener Length: 0.297 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 17 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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